Deckling machine



June 3, 1930. J, RNARD 1,761,051

DECKLING MACHINE Filed Jan. 30, 1929 IL IEJJ 4 INVENTOR.

Patented June 3, 1930 oFFicE WILFRID J. RIVABJ), F FEEDTNG HILLS, MASSACHUSETTS VDEOKLING MACHINE Application filed January 30, 1929. Serial No. 336,235.

This invention relates to machines adapted'to produce deckle edges on paper during the course of its manufacture. One object of the invention is to provide a machine which will produce deckle edges of great uniformity and superiority of appearance A further object is to provide a machine which will si multaneously cuta web of paper intostrips and deckle the edges of the strips so formed.

A further object is to provide a machine for producing deckle edges which will be much speedier in its adjustment to different widths of paper than has been the case with prior deckling devices A further object is to produce a machine of the character described which will be capable of ready application to existing paper making machines Referring to the drawings:

Y Fig. 1 is a diagrammatic side elevation of a '20 Fot'irdrinier machine having my invention applied thereto Fig. 2 is an end elevation thereof, taken on slightly larger scale and looking from the left in Fig. 1;

Fig. 3 is an enlarged view of a deckling roll;

Figs. 4, 5 and 6 are sectional views, taken on line 4t of Fig. 3 and illustrating various shapes which may be adopted for the deckling rolls; and

Fig. 7 is a diagrammatic elevation on an enlarged scale showing the action of the deckling rolls. 7

In Fig. 1, I have indicated a conventional form of Fourdrinier paper making machine in order to illustrate to better advantage the manner in which my improvement operates. The Fourdrinier wire is shown at 10, receiving the paper stock in the customary manner and passing with the deposited sheet of paper between rolls 11. By this time the paper web has been partially consolidated and has acquired suflicient strength to su port its weight. The web to is almost immediately picked up by an endless felt 12 and is carried through a second pair of press rolls 13. Ultimately leaving this felt, the web passes around guide rolls 14 and 15 and is picked up by a second endless felt 16 which carries it between still a third pair of press rolls 17. From this point the web passes to drying and calendering rolls which do not affect the employment of my invention and which therefore need not be described.

It will be noted that the web has one side. in. contactwith the felt 12 in its passage through the rolls 13 and its other side in contact with the felt 16 in its passage through the rolls 1?. This is to remove the impression of the wire which would otherwise remainin the finished sheet. To accomplish this result. the paper is inverted by the guide rolls 1% and 15, having a short free travel, generally vertical, between these rolls. This free travel is utilized in accordance with my invention for the operation of the deckling devices as will now be described.

I have found that instead of producing the deckled edges of the paper at the time when the paper is on the Fourdrinier wire, or by special machines after the paper has been calendered and dried, improved results are obtained if the deckling operation is accomplished by freely acting rolls at a point between the first and last pressing operations. Before the first pressing operation, the paper is too little condensed for the deckling action to be performed to best advantage, while after the last pressing operation the paper is rather too much condensed and dry. At any intermediate point, the deckling could be performed, but from the standpoint of conven ience and accessibility the preferred point is between the rolls 14 and 15. j

The improved decklingdevice which I have devised comprises a series of rolls 20 mounted on a shaft 21 extending transversely across the machine preferably at a point some three to six inches above the guide roll 14. The rolls are drilled as at 22 to receive the shaft, and are mounted for free rotation, either by carrying the rolls freely on the shaft between nonrotatable collars 23 or by fixing both the rolls and the collars upon the shaft and providing the shaft with a mounting whereby it will revolve freely. In either case, the rolls are preferably mounted so as to be adjustable lengthwise of the shaft. The adjustment of the rolls atthis point can be accomplished with ease, and with a great saving of time as compared to previous deckling devices. The rolls themselves may be of varying contours, as suggested in Figs. 4, 5 and 6, although. all the rolls in a single assembly may be of a single type. At the outer periphery of each roll, the contour beveled, and at the circumference the roll is preferably knurled as at 24 so as to get a better grip on the paper and insure evenness of rotation and deckiing action.

With the rolls mounted as described, the paper web in passing will cause them to rotate. At the same time, the rolls will break through the still soft paper, severing it completely and producing a deckle edge. Where a series of rolls are used between the edges of the paper, the web will be out into a plurality of strips, each with deckle edges. In this case, the roll 15 is preferably made concave, as indicated in Fig. 2, so that due to the tendency of the strips to climb to the greatest circumference of the roll, the several strips will be separated in their passage to the dry ing and calendering rolls.

The deckle edge obtained by this method is much superior to that resulting from the use of the common deckle straps, being more uniform and somewhat blunter. The superiority is especially apparent when colored paper is being worked on, as the white edge which mars the appearance of the usual deckle edged colored paper is entirely absent.

While the application of the invention has been shown with particular reference to a Fourdrinier machine, it will be understood that itis of utility in any paper making process in which the paper is delivered as a continuous web.

Vhat I claim is:

1. A method of deckling paper which comprises running the partially dry paper over rotatable rolls each presenting a narrow edge serving to tear through the paper.

2. A method of deckling paper which comprises subjecting an unsupported run of the partially dry paper to the action of rotatable rolls each presenting a narrow edge serving to tear through the paper.

3. A method of deckling paper which com prises subjecting an unsupported run of the damp paper web, after it has been pressed but before it has been dried, to the action of rotatable rolls each presenting a narrow edge serving to tear through the paper.

4. A method of deckling paper which com prises subjecting an unsupported run of the damp paper web, after it has been pressed but before it has been dried, to the action of freely rotatable narrow-edged rolls rotated only by the friction of the paper web.

5. A method of deckling paper which co1nprises subjecting an unsupported run of the paper, between the last two sets of press rolls, to the action of freely rotatable narrow; edged rolls, i

6. A device for deckling paper delivered which comprises a plurality of rotatable narrow-edged rolls operable upon an unsupported run of the paper web bet-ween the last two sets of press rolls.

7 A device for deckling paper which comprises a pair of guide rolls around which the still damp paper web passes, and a plurality of freely rotatable narrow-edged rolls operable upon an unsupported portion of the run of the web between these guide rolls.

8. A device for deckling paper which comprises a pair of guide rolls around which the still damp paper web passes, and a plurality of freely rotatable narrow-edged rolls operable upon an unsupported portion of the run of the web between these guide rolls, the narrow-edged rolls having knurled outer circumferences.

9. A device for deckling paper which com prises a pair of guide rolls around which the still damp paper passes, and a plurality of freely rotatable narrow-edged rolls operable upon an unsupported portion of the run of the web between these guide rolls, that one of the guide rolls over which the web passes from the narrow-edged rolls being concave so as to separate the strips severed by the deckling rolls.

In testimony whereof I have affixed my signature.

WILFRID J. RIVARD.

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